Carburetor



JNVENTOR. LESTER HMESSINGER JR.

ATTORNEY L. H. MESSINGER, JR

GARBURETOR Filed Feb. 18, 1955 Nov. 19, 1935. k

' buretor equipped with the means of thepresent.

Patented Nov. 191, 1935 signor' to Messing er Devices,

Incorporated,

Bridgeport, Conn., a. corporation ot Connecticut Application February 18, 1933, Serial No. 657,337

16 Claims.

This invention relates to new and useful improvements in priming or accelerating means for internal combustion engines.

At the present time at least one internal combustion engine carburetor is constructed with a small pump in its float chamber and which pump due to a vacuum created while the engine (with which. the carburetor is associated) is idling is drawn to a position where the pump is loaded or charged with gasoline and when the .accelerator or throttle of the carburetor is suddenly ad vanced or opened the vacuum is broken and spring means functions to operate the pump to have it spray gasoline into the charge forming passage of the carburetor.r These pumpsare not reliable in their operation and often times do not-function at all. Also, when an engine isl equipped with a carburetor by-pass Valve means .as disclosed .in my applications Serial No.' 102,347 led April 15th, 1926, which matured to Patent #1,910,350, granted May 23, 1933, and Serial No. 653,255, filed January 24th, 1933, the acuum normally used for, operating the pump 'is not' present or available and the pump functions at lthe wrong time.

An object of the present invention is to pro-I vide ameans whereby the accelerating discharge pumps above referred to are reliably operated under all circumstances.

Another object is to provide a means for operating an` accelerating discharge pump of a carburetor and which means is Vautomatically controlled or operated by the throttle operatin means ofthe carburetor.

A `further object is to provide a means for the purpose stated and which is simple in construction and easily installed for use.

Other objects and advantages will become apparent from a consideration of the following detailed description taken in connection with the accompanying drawing wherein a satisfactory vembodiment of the invention is shown. Howf ever, it will be understood that the invention is notlimited to the details disclosed but includes 'all such Variations and modiiications as fall within the spiritof the invention and the scope of the appended claims.

` I n the drawing:

Fig.. i is a side elevational view showing a carinvention; a

Fig. 2 is an end elevational v iew thereof lookjing froml the right in Fig. 1;

Fig.' 3 is a view partly inY plan and partly in (Cl. Mil-34) section, the view being taken substantially along the line 3 3 of Fig. 1;

Fig. 4 is a vertical sectional view taken substantially along the line l-- of Fig. 3;

Fig. 5 is a vertical sectional View taken sub- 5 stantially along the line 5 5 of Fig. 3; and

Fig. 6 is a. view somewhat similar to Fig. 5 but showing the pump at the end of its discharge stroke.

Referring lin detail to the drawing, at I0 is 10 generally indicated a carburetor including a bowl I I to which gasoline is supplied from any suitable source through a. tube or pipe line I2. Also, within the carburetor is an intake passage I3 controlled by any or the usual throttle valve I4 15 mounted on a shaft I5 and above the throttle valve is any or the usual jet I6 for spraying gasoline into the venturi I1 oi the intake passage I3.

The present invention has no particular relation to the operation of the jet I6 of the car- 20 buretor. Chamber I8 within the bowl II may be equipped with any or the usual oat controlled valve means (not shown) for regulating the height of gasoline in the chamber. Within the chamber I8 there is arranged a pump -I9 25 forming a usual part of the carburetor and separated from the pump as by a wall or other means 2li is a vacuum and spring controlled means 2| for operating the pump. By means of tubing or the like (not shown) connected 'at 30 22, the means 2| is placed in communication with the-sucticn or intake side of an internal combustion engine of any or theusual construction (not shown). The means 2| includes an outer cylinder 23 and a piston 2l and within the 35 cylinder and piston and normally' tending to force the piston upwardly is a coil spring 25. A small oriiice places the cylinder in communication with the connection 22.

Pump I9 by means of a link 26 is connected 40 with one end of a. rocker 21 pivotally mounted as at 28 and the other end of this rocker is connected with the piston 24 of the vacuum means 2Iasbya1ink 29. o

An economizer valve is arranged in the cham- 45 ber I 8 and includes a poppet valve 53 normally maintained on its seat by means of a coil spring 5d disposed about its stem 55. The spring 54 bears against a collar 56 on the stem and a housing Si through which the stem passes and 50 4which housing is within the chamber I8.

Housing 51 has an opening 53 in the iioat chamher and when valve 53 is unscated gasoline passes through said opening and downwardly about the valve stem and through a port 59 55 to a channel 30 leading to the high speed jet I6. At its upper end valve stem 55 carries a head 6| to beengaged at the proper times by the rocker 21 which acts to unseat the valve.

In the operation of the device when the engine is operating in a manner to create a high vacuum. as when the engine is idling or when it is operating athigh speed with the throttle .advanced. the suction applied to the means 2| through the connection 22 serves to cause the piston 24 to move downwardly in the cylinder 23 against the action of the spring 25 and, of course, the spring is compressed. As the piston of the means 2| moves downwardly it acts through link 29 to shift the rocker 21 from the position of Fig. 6 to that of Fig. 5 whereby the pump I9 is drawn upwardly in the chamber I3 and gasoline enters the pump and the pump becomes loaded or charged. This upward movement of the rocker 21A also permits the spring 54 to seat the valve 53.

Assuming the parts to be in the relative positions in which they are shown in Fig. 5 should the throttle valve I4 be suddenly opened the vacuum created by the engine will be materially reduced and the spring 25 will act to shift the piston 24 of means 2| upwardly whereby the parts will move into the positions in which they are shown in Fig. 6. In this movement pump I9` has been operated to discharge gasoline and the gasoline is discharged into a passage 39 which in turn is in communication with a passage 3| at its upper end communicating with a nozzle or jet 32. `This nozzle 32 constitutes the accelerating or pump discharge jet of the carburetor and the gasoline discharged by the pump I9 vis sprayed through the jet 32 into the venturi of the carburetor. This pumping means is a priming device or boosting device and is designed to spray gasoline into the venturi I1 when the throttle valve I4 is suddenly opened from idling or closed position. Also, when the engine is operating with a constant throttle the suction on means 2| raises the pump to loading position and when a grade is encountered the engine slows up and the 4vacuum is reduced and spring 25 will act to discharge the pump. When the car passes the crest of the hill the engine again speeds up and\the pump is drawn'up to charged or loaded position.

The 'mechanism as thus far described is all incorporated in a carburetor at present on the `market. As above suggested the suction means for operating the pump I9 vto loading position or condition is not reliable since the means sometimes becomes clogged and does not function. Further, when it does function it does not operate to always discharge the same quantity of gasoline and when an automobile is being parked after the engine is stopped and the vacuum or suction on the means 2| fails the pump operates to spray gasoline through the jet 32 and such gasoline is wasted. Also, when a by-pass valve means such asA disclosed in my above entitled applications is'employed there is no vacuum available to operate the means 2|. .With the parts positioned as in Fig.v 6 'the economizer valve is open and an extra steadystream of gasoline is bein'g fed. However, when the device functions properly the parts are normally positioned as in Fig. 5 with the economizer valve closed and this valve is opened at the end of the discharge stroke of the pump I9. A

The means for operating the throttle valve I4 includes an arm 33 secured to the outer end porrearwardly and be attached to or provide a 5 I means to be manipulated by the hand or foot of an operator to open the valve I4.

To open the throttle valve the arm 33 is rocked in the direction indicated by the arrow 35 in Fig. 2 and during such motion an extension 3i;i 10 of the arm is rocked downwardly tensioning a coil spring 31. As soon as the pressure on the arm 33 is relieved the spring, 31 will act to return the partsto their normal position or to their position Ain which the valve I4 is closed. A 15 set screw 38 is provided to control the movement of the parts under the action of the spring 31. 'Ihis is allvmore or less standard construction and it will be noted that the upper end of the spring 31 is anchored to a clip 39 secured to the 20 carburetor as by being clamped on to a bolt 40 provided for that purpose.

According to the present invention, a bracket or casting 4I is secured to the upper side of the carburetor' III and the bracket is substantially 25 L-shaped and the end portion of its arm 42 is disposed over the bolt40 `while the end portion of its arm 43 is secured-or anchored as by screw 44. On its upper surface the arm 43 carries a pair of spaced bearings 45 in which a rod 46 is 30 mounted for oscillation and this rod has a bent end portion 41 constituting a rocker arm. The free end of rocker arm 41 is bent laterally as at 48 in Fig. 3 to extend under the rocker 21 at one side of the pivot 28 thereof. 35

, general direction, A push rod 50 has its lower end portion connected to or mounted on a pin 5i carried by the extension or portion 3S of arm 33 and this is the same pin to which the lower end 45' of spring 31 is connected. 'Ihe upper Aend portion of push rod 50 passes through a guide portion 52 of the arm 4I of bracket 40 and is adapted to engage the arm 49. 'I'hat is, the rod 50 may be projected to engage and raise the arm 49 and 50 may be retracted to permit said arm to descend.

Figs. 2 and 5 clearly show the positions of the parts when the throttle operating mechanism is retarded or when the throttle valve is closed. It will be noted that in such position the push rod 55 59 is projected and the arm 49 is elevated the lower position of said arm being shown in broken lines in Fig. 2. Further, by particular reference to Fig. 5 it will be noted that when the rocker arm 41 is elevated the pump I9 is in loaded or G0 charging position..

When the throttle operating mechanism is retarded, either when the engine is idling or when the ignition is cut oil, the parts will be positioned as best shown in Figs. 2 and 5 and the pump I9 65 will be loaded or charged. As soon a's the throttle mechanism is advanced as when starting an engine or increasing its speed over idling speed vthe push rod 59 is drawn downwardly with the result that there is no force to sustain the rocker arm 41 against the rocker 21 to hold the pump in charging position against the action of spring 25 and said spring therefor acts to shift rocker 21 about its pivot 23 from the position of Fig. 5 to that of Fig. 6 and the pump I9 discharges forc- 75 ing gas through the passage 3@ to the passage 3i and causing the `iet l32 to spray the gasoline into the charge forming passage orfventuri of the carburetor.

From the foregoing description itwill be understood that as the throttle operating mechanism is shifted to retarded position by the coil spring 31 the'push rod i5@ will act through arm 49, rod 45 and rocker arm 41 to shift the rocker 21 about its pivot and raise the pump I9 to loaded or charging position. The pump is positively shifted or raised to such position and there is no dependence on vacuum to accomplish this function. Therefore, whenever the throttle is retarded the pumpwill be loaded or charged and will discharge to spray gasoline through the jet 32 whenever the throttle is again advanced ii' the .vacuum drops suiiiciently. l

This dischargingci the pump is, of course, ef- Iected by the coil spring 25 on the push rod 50 being retracted to permit of lowering .ot the rocker arm di. Attention is also directed to the fact thatl when the engine is stopped as when an automobile is being parked the pump will be held in loaded or charged position and :will not discharge due to 'the failure oi'a vacuum after the ignition vcircuit is opened. It will also be noted that the means of the present invention is here disclosed as in the nature of an attachment and that the same does not require any change in the construction of the 'carburetor and does not in any way interfere with the normal operation o! the carburetor.

It will also be apparent that the present means does not in any Way detract from the usefulness of the economiser valve. This valve will be opened in the usual manner and at the'usual times. With the present attachment to place on a carburetor the pump will be returned to charged or loaded positionl immediately on the throttle means being retarded and the economizer valve is also .permitted to immediately return to its seat. When the throttle is retarded it is not necessary to wait for the vacuum to raise the pump and release the valve 53 since this will be done mechanically and further, il the pump is loaded and' the engine stopped the arm M will retain the pump in its loaded position.-

Having thus described the nature of the invention, what is claimed is:

l. In combination, a carburetor including a throttle valve and a gasoline chamber, means to advance said throttle valve toward open position and other means to return it toward retarded position, a pump communicating withthe gasoline chamber of the carburetor, a rocker conriected at one end with said pump, a spring-means con-,

nected with the other end of said rocker and normally tendingto operate the pump to have it discharge, said pump adapted when discharging to spraygasolineinto the intake passage of the carburetor, a rocherarm engaging said rocker, and

means whereby as the throttle operating mecha- 2. In combination, va, carburetor including a throttle valve and a gasoline chamber, means to advance said throttle valve toward open position .pump operating means.

at one end with said pump, a spring means connected with the other end ,oi said rocker and normally tending to operate the pumpl to have it discharge, said. pump adapted when discharging to spray gasoline into the intake passage of the 5 carburetor, a rod rotatably mounted on said carburetor, an arin on said rod and projecting to engage said rocker, a second arm on said rod, a push rod adapted to be projected to engage said second arm and rock the rod to have its iirst arm 10 engage the rocker to operate the punipto loading position and to be retracted away from the said second arm of the rod to release the rocker in order that the pump may be operated by the spring means, and meansto project ani retract i5 said push rodl as the throttle valve is advanced and retarded.

' 3. In combination, a carburetor including a throttle valve and a gasoline chamber, means to advance said throttle valve toward open posi- 2O tion and other means to return it toward retarded position, a pump communicating with the gasoline chamber of the carburetor, vacuum operated means to operate said pump toward loaded position, means to operate said pump to 25 spray gasoline into the intake passage of the car- .buretor on opening of the'throttle valve, and

means controlled by the throttle valve operating means to reset the pump for operation by the 30 4. In combination, a carburetor including a throttle valve and a gasoline chamber, means to advance said throttle valve' toward open position and other means to return it toward retarded position, a pump communicating with the gaso- 35 line chamber of the carburetor, vacuum operated means to operate said pump toward loaded position, means to operate said pump to spray gasoline into the intake passage of the carburetor on advancing of the throttle valve, and positively 4Q operated means controlled by the throttle valve operating means to reset the pump for operation by the pump operating means.-

5. In combination, a carburetor including a throttle valve and a gasoline chamber, means to 45 advance said throttle valve toward open position and other means to return it toward retarded position, a pump oounicating with the gasoline chamber of the carburetor, vacuum operated means to operate said pump toward ioaded posi- 50 l and lother means to return it toward. retarded position, a pump communicating with the gasoe0 line chamber of the carburetor. vacuum operated means to operate said pump toward loaded posi'- tion, spring means to operate said pump to spray gasoline into the intake passage of the carburetor on advancing of the throttle valve, and positively e5 operated means controlled bythe throttle valve operating means to reset the pump for operation by thc spring means.

7. In combination, a carburetor including a throttle valve and a gasoline chamber, means to 7o advance said throttle valve toward open position and other means to return it toward retarded position, a pump communicating with the gasoline chamber of the carbureto vacuum operated means to operate the pump toward loaded 75 operated thereby. on its movement toward throt-` position, spring means to operate said pump to spray gasoline into the intakepassage of the carburetor on advancing of the throttle valve, and means controlled by the throttle valve operating means and operated thereby on its movement toward throttle valve closing position to reset the pump for operation by the spring means.

' 8. In combination, a carburetor including a throttle valve and a gasoline chamber, means to advance said throttle valve toward open position and other means to return it xtoward retarded position, a pump communicating with the gasoline chamber of the carburetor, vacuum operated means to operate said pump toward loaded position, means to operate said pump to spray gasoline into the intake passage of the carburetor on advancing of the throttle valve, and positively operated means controlled by the throttle valve operating means to move the pump tofully loaded position as the throttle valve operating means moves to retarded position.

V9. In combination, a carburetor including a throttle valve and a gasoline chamber, means to advance said throttle valve toward open position.

and other means to return it toward retarded position, a pump communicating with the gasoline chamber of the carburetor, vacuum operated means to operate the pump toward loaded position, means to operate the pump to spray gasoline into the intake passage of the carburetor on advancing of the throttle valve and means controlled by the throttle valve operating means and tle valve closing position to reset the pump in loaded position.

10. In combination, a carburetor including a throttle valve and a gasoline chamber, means Y to advance said throttle valve toward open position and other means to return it toward retarded position, a pump communicating with the gasoline chamber of the carburetor, a rocker connected rat one end with said pump, means connected with the other end of said rocker and normally tending to operate the pump to have it discharge, said pump adapted when discharging to spray gasoline into the intake passage of the carburetor, a rocker arm engaging said rocker, and means whereby as the throttle operating mechanism of the carburetor is retarded said rocker arm operates said rocker to operate said pump toward loading position and as said throttle operating means is advanced toward open position of the throttle said rocker arm moves out of the way to permit said pump operating means to function. v

11. In a carburetor including a throttle and a throttle lever, a fuel pump adapted to be operated to charged position by vacuum, and throttle lever operated means operable to vcause charging of said pump as the' throttle lever is moved to throttle closing position.

. 12. In a carburetor including a throttle and a throttle lever, a fuel pump adapted to be operated to charged position by vacuum, and throttle lever operated means positively operable to cause charging of said pump as the throttle lever is moved to throttle closing position.

I 13. In a carburetor including a throttle and a throttle lever, a fuelv pump adapted to be operated to charged position by vacuum, and throt-4 tle lever operated means operable to cause charging of said pump as the throttle lever is moved to throttle closing position and to hold the pump in charged -p0sition while the throttle lever is in throttle closing position.

14. In a carburetor including a throttle and a throttle lever, a fuel pump adapted to be op` erated to charged position by vacuum, and throttle lever operated means operable to cause charging of said pump as the throttle lever is moved to throttle closing position and positively operable to hold the pump in charged position while the throttle lever is in throttle closing position. 15. In a carburetor including a throttle and a throttle lever, va fuel pump adapted to be operated to charged position by vacuum and throttle lever operated means for rendering the fuel .pump inoperative, said means being so cony structed and arranged as to permit of movement of the throttle to closed position irrespective of the position of the' pump at the beginning of such movement.

16. In a carburetor including a throttle and a I LESTER H. missINGER, JR. 

